Still a work in progress - I'm going to try and acquire more luminance data tonight if the weather gods are feeling nice. BUT I'm happy enough with the results so far.
This is was taken over ~3.5 hours last night:
2 hours luminance
20/30/45min RGB 2x2 bin
Astronomic 2c
Explore Scientific ED80 triplet (from Glend! Thanks Glen!)
Orion field flattener
Atik 428ex
xagyl motorised FW
Orion TOAG and QHY 5l-II
I'm really loving the small APO scopes. I can set up all my gear in 15 minutes and two trips AND I don't have to be that careful with polar alignment (still, have my legs marked on the concrete, I just don't have to drift align in PHD2).
Fantastic!
Hope you enjoy. Still a novice imaging processor - does anyone have tips for removing noise from RGB channels when stretching (apart from the obvious, shoot more RGB)? I tried 2 and 3 drizzle in DSS but not a huge improvement.
Larger Astrobin here:
http://astrob.in/249127/B/
Tim
Edit: for those interested, there is a shift in the focal point of these RGB filters when used with this refractor/FF combination but the difference is very subtle and I didn't notice it at all on the FWHM measurements on subs. The difference is quantifiable using a bahtinov mask but again, only minor and worst on the blue, as others have reported. Doesn't seem to be a need to refocus on filters IMHO.
The Astronomic 2c are parafocal on my RC8.